The Fractal Design Define R cases can house a lot of hard drives, but they are kind of big. My Define R6 can theoretically house 11 3.5" drives iirc in addition to 4x 2.5" but it does not come with that many drive sleds out of the box. For the 2.5" drives only 2 sleds are included. I think for the 3.5" it was about 6.

Honestly, I’m really happy with the ability to just try out stuff with docker and then nuke the entire compose stack if it does not work. I also know perfectly where any possible leftovers from the attempt are (the bind mounts or volumes) and can be certain I deleted everything I “installed”.

Although I have to admit that I absolutely had some issues with containers in the past, mainly when there are two or more containers with dependencies on one another.

Never used k8s or the cloud so I have nothing to comment on that ;D

Not a valid option if you are looking specifically for lossless music